Question: What is a relation that starts with the letter z.
Paraphrase: What could be a connection that begins with the letter z.
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q930933 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'z')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: Zehntelwertszeit, Zehntelwertszeit, Zerteilungsgrad, Zerteilungsgrad, Zoom factor, Zoom factor, Zustandszahl, Zustandszahl, Zeitspanvolumen, Zeitspanvolumen